1 /* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */ 2 /* 3 * Copyright 2008 Google Inc. 4 * Author: Robert Love 5 */ 6 7 #ifndef _UAPI_LINUX_ASHMEM_H 8 #define _UAPI_LINUX_ASHMEM_H 9 10 #include <linux/ioctl.h> 11 #include <linux/types.h> 12 13 #define ASHMEM_NAME_LEN 256 14 15 #define ASHMEM_NAME_DEF "dev/ashmem" 16 17 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */ 18 #define ASHMEM_NOT_PURGED 0 19 #define ASHMEM_WAS_PURGED 1 20 21 /* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */ 22 #define ASHMEM_IS_UNPINNED 0 23 #define ASHMEM_IS_PINNED 1 24 25 struct ashmem_pin { 26 __u32 offset; /* offset into region, in bytes, page-aligned */ 27 __u32 len; /* length forward from offset, in bytes, page-aligned */ 28 }; 29 30 #define __ASHMEMIOC 0x77 31 32 enum { 33 ASHMEM_SET_NAME = _IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN]), 34 ASHMEM_GET_NAME = _IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN]), 35 ASHMEM_SET_SIZE = _IOW(__ASHMEMIOC, 3, size_t), 36 ASHMEM_GET_SIZE = _IO(__ASHMEMIOC, 4), 37 ASHMEM_SET_PROT_MASK = _IOW(__ASHMEMIOC, 5, unsigned long), 38 ASHMEM_GET_PROT_MASK = _IO(__ASHMEMIOC, 6), 39 ASHMEM_PIN = _IOW(__ASHMEMIOC, 7, struct ashmem_pin), 40 ASHMEM_UNPIN = _IOW(__ASHMEMIOC, 8, struct ashmem_pin), 41 ASHMEM_GET_PIN_STATUS = _IO(__ASHMEMIOC, 9), 42 ASHMEM_PURGE_ALL_CACHES = _IO(__ASHMEMIOC, 10), 43 ASHMEM_GET_FILE_ID = _IOR(__ASHMEMIOC, 11, unsigned long), 44 }; 45 46 #endif /* _UAPI_LINUX_ASHMEM_H */ 47